- Add voice recording with transcribe endpoint (ASR) for multimodal input
- Android: add RECORD_AUDIO and INTERNET permissions
- Refactor tool naming: frontend tools use 'front.' prefix, backend tools use 'back.'
- Migrate calendar tools: create_calendar_event -> back.mutate/list/delete events
- Add calendar_event_list.v1 and calendar_operation.v1 UI card types
- Update all Flutter and Python tests to match new tool naming conventions
- Add record package dependency for voice recording
- Add owner_id check in repository delete operation
- Fix time range validation for partial updates
- Wrap pre-query in try/except for consistent error handling
- Use default_factory instead of mutable defaults
- Add max_length constraint for timezone field
- Remove unused dependencies and empty validators
- Extract magic numbers to constants
- Simplify update logic with model_dump
- Add ScheduleItem Pydantic schemas with metadata support
- Add repository layer with CRUD operations
- Add service layer with authorization
- Add FastAPI router with all endpoints
- Add unit and integration tests
- Update API documentation
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